EP 4297240 A1 20231227 - NON-CONTACT POWER SUPPLY SYSTEM AND POWER RECEIVING DEVICE
Title (en)
NON-CONTACT POWER SUPPLY SYSTEM AND POWER RECEIVING DEVICE
Title (de)
KONTAKTLOSES STROMVERSORGUNGSSYSTEM UND STROMEMPFANGSVORRICHTUNG
Title (fr)
SYSTÈME D'ALIMENTATION EN ÉNERGIE SANS CONTACT ET DISPOSITIF DE RÉCEPTION DE D'ÉNERGIE
Publication
Application
Priority
- JP 2021024832 A 20210219
- JP 2022010961 A 20220127
- JP 2022003783 W 20220201
Abstract (en)
A primary-side resonant circuit (110) of a power transmission apparatus (100) has an impedance varying element that increases, when supply of electric power is stopped, an input impedance of the primary-side resonant circuit so as to have predetermined standby current flowing through a primary-side coil (112). A power reception apparatus (200) includes a magnetic flux amplifier circuit (220) configured to amplify magnetic flux generated by the standby current flowing through the primary-side coil of the primary-side resonant circuit. The power transmission apparatus further includes a primary-side detection circuit (120) configured to detect a change in the voltage of the primary-side coil, a change in electric current flowing through the primary-side coil or a change in a magnetic field in the vicinity of the primary-side coil; each of the changes is caused by the magnetic flux amplified by the magnetic flux amplifier circuit.
IPC 8 full level
H02J 50/12 (2016.01); H02J 7/00 (2006.01); H02J 50/90 (2016.01)
CPC (source: EP US)
H02J 7/0047 (2013.01 - US); H02J 7/00712 (2020.01 - US); H02J 7/02 (2013.01 - EP); H02J 50/12 (2016.02 - EP US); H02J 50/402 (2020.01 - US); H02J 50/70 (2016.02 - US); H02J 50/90 (2016.02 - EP); H02J 7/0047 (2013.01 - EP); H02J 50/402 (2020.01 - EP)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
EP 4297240 A1 20231227; US 2023396100 A1 20231207; WO 2022176598 A1 20220825
DOCDB simple family (application)
EP 22755919 A 20220201; JP 2022003783 W 20220201; US 202318235168 A 20230817